Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a3ac1c7e83495b…

MALICIOUS

PDF

77.8 KB Created: 2021-05-27 02:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d13e9e884e2142e228523a72d0cde1ce SHA-1: 8b68225fd7e2049e3be0966c1ffe4dc256149cd1 SHA-256: e3a3ac1c7e83495b48339f8d0c9d667cc432ec58cd20d54431fd372f6bf8d87e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute further malicious content or conduct phishing. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/9f3cb574d9269b36df850ae676b3db59/94388681069.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078139961cfe---67523238552.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0bdb7eafe---53679832469.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/bf367d027644d0e97dfa4dd1ed3673c0/89710333252.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/2i9jgu65qosvdd42min4qapv9t/65289507109.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/2971f5e947a96851ec25a9d9b16c8a6b/refuwazedamuvilifin.pdf
    • http://komputerzagrosze.pl/userfiles/file/16818811589.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/auibmkt2c9fekgbf53tq7bhvja/164765645.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/0mqftridodcovl2pvb47aav7j5/tufapibuvibozaxigabod.pdf
    • http://dgjst.com/upfile/file/97816094803.pdf
    • http://brmxn.com/userfiles/file/20210522140522_ryf8ha.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/8720bab3bc5b21e7b756b7fce9f393b0/87919059988.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/15221a154d8672f32f8d6eab5a866a0d/72663483285.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085c0ec44224---werigujexolewididezibefun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=regles+du+jeu+dixit+odyssey
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e68a.bin
572fc43615fc6fb3ea52a54536629d1b594bea15ecdd559966455e99d6d3d274		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE68A 4716 bytes
font_01_sfnt_off0000f6b7.bin
8f376cbcdb8aebd5d0a2bcf69fb0e160d69e90727a02e66f5256ccabe61c6e68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B7 11932 bytes
font_02_sfnt_off00011cce.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCE 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.